I what part of the atom is most of its mass?

Which of these elements has seven valence electrons?

A device that uses electromagnetic induction to convert kinetic energy into electrical energy is a

An insecticide kills a few insects, but a few survive. Because of natural selection, which of the following is most likely to happen?

According to the LAw of Consevation of Mass

Until the 1700's, scientists classified organisms into only two kingdoms. Today's scientific classification system has four kingdoms. Why have scientists added more kingdoms?

Which of the following traits found in birds is not an adaptation for flight?

Aluminum-27 has 13 protons. What is the total mass of its neutrons?

Iodine is in group 17 of the Periodic Table. During chemical changes, it forms an ion whose charge is

Which of the following is a learned behavior?

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